Methionyl-methionine stereoisomers and use thereof in cosmetics
View Patent ↗The present invention relates to a cosmetic formulation comprising certain methionyl-methionine stereoisomers and to the use of methionyl-methionine for nail and/or hair treatment.
1. A method for treatment of human nails and hair, said method comprising applying a formulation comprising a stereoisomer of a methionyl-methionine of formula (I):
to human nails or skin.
2. The method according to claim 1 , wherein said methionyl-methionine comprises at least one methionyl-methionine stereoisomer selected from the group consisting of D-methionyl-L-methionine, L-methionyl-D-methionine and D-methionyl-D-methionine.
3. The method claim 2 , wherein said formulation further comprises L-methionyl-L-methionine.
4. The method according to claim 3 , wherein the total amount of L-methionyl-L-methionine, based on a total weight of all methionyl-methionine stereoisomers present in the formulation, is less than 50% by weight.
5. The method according claim 3 , wherein a weight ratio of DL- and LD-methionyl-methionine to DD- and LL-methionyl-methionine is from 9:1 to 2:3.
6. The method according to claim 1 , wherein said formulation is a hair conditioning formulation.